Can you imagine the Allies in World War II taking a similar line? Hey, we cant bomb Berlin, because that will make the Germans want to retaliate, and someone might get hurt.
Or offend the Japanese because they might repeat the Bataan Death March.
Remember in the movie “Patton”, where the Germans couldn’t understand why there was so much fuss about Patton slapping the soldier.
Bombing Berlin was strategically necessary to win the war.
I don't think 2 pastors burning a book is going to accomplish anything other than maybe inflaming some Iraqi's and Afgani's in areas where our soldiers have worked hard to build good relations with the townspeople.
Actually the Germans did retaliate by switching their bombings from military installations, to terror bombing London, a move which ultimately cost them the war, since it give relief to the military installations to make repairs.